This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A013881 #24 Jul 08 2025 02:51:04 %S A013881 65536,68719476736,72057594037927936,75557863725914323419136, %T A013881 79228162514264337593543950336,83076749736557242056487941267521536, %U A013881 87112285931760246646623899502532662132736,91343852333181432387730302044767688728495783936 %N A013881 16^(5*n+4). %H A013881 Vincenzo Librandi, <a href="/A013881/b013881.txt">Table of n, a(n) for n = 0..100</a> %H A013881 Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/RecursiveSequences.html">Recursive Sequences</a> %H A013881 <a href="/index/Rec#order_01">Index entries for linear recurrences with constant coefficients</a>, signature (1048576). %F A013881 a(n) = 1048576*a(n-1). - _Colin Barker_, Feb 28 2015 %F A013881 G.f.: 65536 / (1-1048576*x). - _Colin Barker_, Feb 28 2015 %F A013881 a(n) = A001025(A016897(n)). - _Michel Marcus_, Feb 28 2015 %t A013881 16^(5*Range[0,10]+4) (* or *) NestList[1048576#&,65536,10] (* _Harvey P. Dale_, Jul 21 2024 *) %o A013881 (Magma) [16^(5*n+4): n in [0..10]]; // _Vincenzo Librandi_, Jul 10 2011 %o A013881 (Maxima) A013881(n):=16^(5*n+4)$ %o A013881 makelist(A013881(n),n,0,10); /* _Martin Ettl_, Nov 12 2012 */ %o A013881 (PARI) Vec(65536/(1-1048576*x) + O(x^20)) \\ _Colin Barker_, Feb 28 2015 %K A013881 nonn,easy %O A013881 0,1 %A A013881 _N. J. A. Sloane_